/**
* Creates and initializes actual ServerMedaitor.
*/
static public void init(String aMediatorConfigFile) throws Exception {
// The ServerMediator config
configElm = new XMLLib().load(aMediatorConfigFile).getRootElement();
// Factory: create ServerMediator from class name in config
String mediatorClassName = configElm.getChildText("class").trim();
serverMediator = (ServerMediator) Class.forName(mediatorClassName).newInstance();